CVE-2025-5777: CWE-125 Out-of-bounds Read in NetScaler ADC
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
AI Analysis
Technical Summary
CVE-2025-5777 is an out-of-bounds read vulnerability (CWE-125) in Citrix NetScaler ADC products configured as Gateway or AAA virtual servers. The root cause is insufficient input validation, which can lead to memory overread conditions. The vulnerability affects versions 13.1 and 14.1 of NetScaler ADC. The CVSS 4.0 base score is 9.3, reflecting network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No patch or remediation details are currently available.
Potential Impact
Successful exploitation could allow an unauthenticated attacker to cause memory overread, potentially leading to information disclosure or system instability. The high CVSS score indicates significant risk to confidentiality, integrity, and availability of the affected system. However, no known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor vendor communications for updates. No specific mitigation steps are provided by the vendor at this time.
CVE-2025-5777: CWE-125 Out-of-bounds Read in NetScaler ADC
Observed in the wild — via OffSeq Mirage
Description
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
CVSS v4.0
Score 9.3critical
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-5777 is an out-of-bounds read vulnerability (CWE-125) in Citrix NetScaler ADC products configured as Gateway or AAA virtual servers. The root cause is insufficient input validation, which can lead to memory overread conditions. The vulnerability affects versions 13.1 and 14.1 of NetScaler ADC. The CVSS 4.0 base score is 9.3, reflecting network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No patch or remediation details are currently available.
Potential Impact
Successful exploitation could allow an unauthenticated attacker to cause memory overread, potentially leading to information disclosure or system instability. The high CVSS score indicates significant risk to confidentiality, integrity, and availability of the affected system. However, no known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor vendor communications for updates. No specific mitigation steps are provided by the vendor at this time.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- Citrix
- Date Reserved
- 2025-06-06T06:14:02.358Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 68516458a8c921274385b4a8
Added to database: 06/17/2025, 12:49:28 UTC
Last enriched: 08/04/2026, 13:23:41 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 358
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